Traversing-means for winding machines



Dec. 15, 1931. A, E, BOOB 1,836,105

TRAVERSING MEANS FOR WINDING MACHINES Filed March 19, 1951 4 Sheets-Sheet l ja uar:

a m z W Dec. 15, 1931. A. E. BQOD 1,836,105

Dec. 15, 1931. A. E. BOOD 1,836,105

TRAVERSING MEANS FOR WINDING MACHINES Filed March 19, 1931 4 Sheets-Sheet 3 M/ZM A. E. BOOD TRAVERSING MEANS FOR WINDING MACHINES Dec. 15, 1931.

Filed March 19, 1931 4 Sheets-Sheet 4 h R RMQ R m mw k wmk mx QQ Q k QQ QQM jz/azzi'hr' m z W 9 Patented Dec. 15,1931

* UNITED) STATES.

PATENT 1 OFFICE:

.urroN r, noon, or cams'ron, mom: rsmmn, assrenon 'ro wmmnq courm, or nosron, nassacnusnr'rs, A coaronarrou or massacnusm rs 7 Application fled larch 19, 1931. Serial 1T0. 523,894.

cord, wire and other strand materials to produce cops, bobbins, cones, coils orpackages. In the following specification and claims the term yarn is used in a general sense todesignate the materialto be wound, whatever its nature, and the term package to indicate the product produced by the machine whatever the form thereof.

One object of the present invention is to provide a traversing-means for winding machines consisting in a single rotating element gxwhich may be operated at a high rate of speed without shock of vibration.

Another object of the invention is to provide a traversing-means of the type specified which displaces the usual bulky and heavy cams and the reciprocating threadggides and other moving parts connected to operated therefrom.

Another object of the invention is to provide a traversing-means constituted by a rotating element, such as a roll or drum, having on its peripheral surface a yarn-receiving and uiding groove extending helically in one 'rection and back in the opposite direction with its convolutions crossing to adapt the yarn to feed through the groove and be traversed thereby from end to end of the package to deposit it in helical turns which form the layers. constituting the wound mass.

to provide a traverse-roll of the type disclosed in United States Letters Patent .No. 1,749,355 to Franklin Augustus Reece, dated March 4, 1930, which is of simpler construction as regards the formation of the grooves,

less expensive to manufacture, yet as efiicient in operation for the purposes speclfied,

Further objects of the im rovement are set forth in the following specification which at the crossing points chamfered or cut away A particular object of the invention is.

spindle androtatableyarn receiver orcoptube on which the package is wound, with the present improved traversing-means apv i plied to use therewith;

Fig. 2 is an end elevation of the machine shown in Fig. 1 and illustrating in addition the arrangement of the supply-cop or bobbin from which the yarn is delivered to a tensiondevice and thence to the winding mechanism Fig. 3 is an enlarged side view of the'presen;1 improved traversing-means or grooved ro I Fig. 4 is a similar view showing posite side of the roll;

Fig. 5 is a cross-sectional view of the roll taken on line 5 5 of Fig. 3; and

Fig. 6' is a development of the surface of the roll showing the arrangement of the grooves.

In the Reece Patent No. 1,749,355, hereinbefore referred to, the traversing-means consists of a cylindrical drum or roll having on its peripheral surface a yarn-receiving and guiding-groove extending in helical, convolutions in one direction a distance approximately the length of the package to be wound and'back in the opposite direction to the. starting point with its convolutions crossing each other,'and with the sides of the groove the I to prevent the yarn being diverted from that portlon of the groove in which it is traveling .to an oppositely extending portion of said groove. The oppositely extending portions of the groove are preferably of different depths at the crossing points, or at different levels with respect to the'periphery'of the a roll, to further assist in maintaining the yarn in that portion of the groove in which it is traveling to prevent it being diverted into an opposite portion at the crossings.

In the present invention the chamfering or cutting away of the cove at the crossin points is dispensed with to render the ro simpler to construct and cheaper to manufacture, but in order to insure that the yarn will follow the proper direction of traverse at the crossing points and not be diverted from a portion of the groove leading inonediretion to a portion leading in the opposite di- 1 00 I rection, I have devised a simple yet-in enions method of forming the grooves at t eir crossing-points as will later-be more specifically described. Briefly, my improved method of constructing the grooves, consists in ,oifsetting portions .of thegroove which cross another portion or, in other words, by staggering the sections of the groove extending in a vcertain direction, one with respect to the It is to be understoo however, that the present invention is applicable to winding machines of other types in which the package is driven from a separate roll or wherein it is positively driven from a rotating windingspindle. It is therefore to be understood that the invention is not limited with respect to its method of application to the winding machine or its mode of operation in connection with the other winding elements thereof.

In the present drawings the winding mechanism is illustrated as comprising amandrel or spindle. for supporting the package to be wound; the present improved traversing- I means for distributing the yarn. on the package; a supply-holder for mounting a cop, bobbin or other form of package from which the vyarn is supplied; and a' tension-device through which the yarn feeds from the sup-' ply'and from which it leads directly to the traversing-means, or grooved roll. In Figs. 1 and-2 of the drawings, 2 designates the main frame of a winding machine which may comprise a plurality of Winding units arranged in gang form along a bed or table 3. A se- =r1es of cross-arm brackets 4 extend laterally of andare bolted at 6 to longitudinal rails .7 supported from the bed 3, said brackets being provided with bearings for a horizontal drive-shaft 12 which carries a series of v the grooved traverse-rolls 15, one for eachunit windin 'construction and arrangement.

of the winding mechanism. The rolls 15 are keyed or secured fast on theshaft 12 by any suitable means such, for example, as a setscrew 13 shown in Figs. 2, 3 and 5. The pres ent drawings illustrate only one unit of the machine, it being understood that allof t e units are of substantially the same Referring to Fig. 1, each bracket 4 is proyided with housings 9 for annular ballbearmgsf. 10 in which the roll-shaft 12 is journaled; The shaft 12 maybe driven from any suitable source of' power, such as a motor geared or otherwise connected thereto at its end. The shaft 12 and the drums or rolls l5 carried thereby constitute the only moving parts of themachine, the rolls being preferably continuously rotated and the winding operation being controlled by placing the packages in contact therewith to start'the winding and by removing them therefrom to arrest the winding.

The yarnmass or package may be sup ported on a central core or mandrel constituted by a paper tube or a wooden or fiberyarn-receiver T such as shown in Fig. The winding machine as herein illustrated 1s adapted to wind a frusto-conical mass of yarn, generally termed a cone, and for this purpose the support or yarn-rece1ver T is of frusto-conical shape as illustrated in Fig. 1. The cone-tube or receiver T .is mounted free to rotate on a dead spindle 5 carried at the end of a swinging .arm 16 which is pivoted at its opposite end on a stud or rod 17 The stud 17 is secured in a hub 18 at the top of an arm 19 projecting upwardly from the frame member or bracket 4. The main portion of the arm 16 is of forked construction, having two hubs 20 and 21 which pivot on the rod 17, see Fig. 1, and are held in place by a collar 22. The arm 16 has an ,outer extension 23 which is swiveled at 24 to adapt the spindle 5 to rock or'tilt with respect to the axis of'the roll 15, whereby to aline the surface of the package with the periphery of the roll in the usual manner as well known to those versed in the art.

' As the yarn builds up on the co receiver Tthe latter recedes from the roll 15 with the spindle 5 moving upwardly as provided for by the-swinging action of the arm 16. Instrumentalities are generally provided for moving the package away from the roll 15 to arrest the winding operation, the

e-tube or.

stopping mechanism usually comprising a 'rod or bar 25 connected to an arm or extension 26 of the spindle-supporting arm '16 as v illustrated in Fig. 2 of the present drawings. As the stopping-mechanism of the winding machine constitutes no part of the present invention, however, it is not herein described in detail. I

The yarn or other strand material may be supplied to the winding operation in any usual manner and, .as herein shown-,a supply-bobbin B is mounted at the front of the machine at .a height to be readily accessible to the operator in dofling and replenishing the supply. The supply-holder is arranged as next described. Clamped to the legs 8 of the machine are arms or brackets 27 carrying a horizontal'rod 28 on which are mounted a pluralityof brackets 29, one for each winding unit. Attached to each bracket 29' is a tension-device 30 which comprises a suitable frame-member 31 for mounting a pair of tension-disks 32 held on a cross-pin 33.-

The tension-device may be of any usual construction and is not hereinfiescribed infdetail as it forms no part of the resent invention. Associated with the tension-device is a An'arm 39 is attached to the front of .the bracket 29 and extends upwardly at an in-- clination'to the vertical to, form a support for the supply-holder, represented generally at40. As herein shown the supply-holder 40 comprises a rotatable hub 41 carrying radial spindles 42 on which the supply-bobbins the head b of the bobbin as the latter ,is

B are placed, the spindles being adapted to be turned with the hub to bring a bobbin into inverted position with its nose end pointed toward the guide 35 through which the yarn leads. The bobbins B are retained in place on the spindles 42 by means of circular side strips 43 which engage under turnedinto down (position.

1 As the yarn lea s up] from the tension-de- -vice"30 to the traverse-roll 15 "it is guided by a thread-bail :45 extending horizontally across the front of the roll 15, slightly below the axis thereof, see Fig. 1. The threadbail 45 consists of a wire bent into inverted U-sha with its legs 46 pivoted on crosspins 4 supported from the machine-frame.

The thread-bail 45 may be constituted as a feeler or "breakage-lever, being arranged to swing outwardly away from the traverse-roll '15 when the tension on the strand is released through breakage or exhaustion of the supply. The threa -bail 45 cooperates with the stopping-mechanism of the machine to initiate the action of the means which raises the package 'awayfrom the r'iphery of the drive-roll to arrest the win ng o eration, the construction and arrangement 0 this mecha- Y nism being in accordance with the usual practice. I

. v The traverse-M1115 which forms the sub'-.

ject-matter of the present application is preferably in the form of a cylinder having a length-several times its diameter. The roll 15 may be constructed of metal in the form of a hollow cylinder or it may be made of wood, fiber or composition such as bakelite.

When constructed of metal the grooves in the roll maybe cast or machined, and when a composition suchas bakeliteis employed the grooves may be formed in the operation of molding the cylinder. In any case,

the present simplified form of the grooves provides for greater facility in manufacturlng'the rolls either by machining operations by reference to or by molding and therefore reduces the cost of manufacture. Referring now to Figs. 3 to 6 of the-draw- -ings, the improved traverse-roll 15 as herein illustrated is formed with a substantially continuous groove extending helically from one end to the other and back again to the starting point. While the roove, being continuous, has been referre to as a single groove, for convenience of description-it will hereinafter be referred to in the specification as comprising two grooves extending in opposite directions and joined at their ends,

One groove 50 may be said to start at the point a: at the right-hand end of the roll, see

'Fig. 3, and extending in helical convolutions it encompasses the periphery in three turns or revolutions to a oint 2 at the opposite end of the roll. be other "reversely-extending groove 51 starts at the point zfand leads back in the opposite direction in three a groove 0r grooves having a greater-or less number of turns or convolut ons extending in each direction in accordance with require:- ments of the winding to be performed. With the present arrangement, the traverse-roll 15 will operate to'traverse the yarn from one end of the packageto the other in three turns or convolutions about its circumference to effect what is termed a three wind at the start of the winding. In drum-driven machines the peripheral speed of the wound mass remains constant whereas its angular velocity: or s ed of revolution progressively diminishes uring the winding, due to the gradual increase in its diameter, it being taken as 'a premise that the speed of the driving drum or roll is constant. It will thus be understood that if a package .is started with-a three wind, for example, as the wound mass increases in diameter the number of winds is reduced and the package-ma eventually finish with one wind or even a action of a wind. In other cases where the package is rotated at a constant rate by a positively driven winding-spindle the number of winds remains the same from start to finish of the package as will be readily understood by those versed in the present art.

It will be obsei ved from the foregoing, and

igs. 3, 4 and 6 of the drawings, that the groove 50 leads toward the lefthandend of the roll 15 to traverse the yarn in this direction, while the groove 51 has a reverse lead, or toward the right-hand end of the roll to traverse the yarn back again in the opposite direction; the direction of rotation o the roll being indicated b the arrow in Fig. 2. It will also be note that with the present-arrangement, wherein each groove makes three complete turns about the periphery of the roll, the two grooves will cross each other or intersect at five different points, three on one side of the roll and two on the opposite side, see Fig. 6 whichshows a demore at the point (1 on the opposite sideof the roll and finally at the point e," whenceit continues to merge with the groove 51 at the terminal point z.- e i As inthe traverse-roll of the patent hereinbefore referred to the grooves 50 and 51 in which the yarn is traversed are of different depths where they cross each other, this change in depthbeing for a purpose as later explained. Each of the grooves and 51 has a normal maximum depth throughout the greater portion of its extent, but where the grooves cross each otherone or the other of them is made of relatively slight depth to assist in guiding the strandl through the crossover without diversion from the groove in which it is traveling to the groove of opposite direction- The profiling of the grooves 's shown a hicall 'n Fi 5 (1 their ar- 1 gr p y 1 g an of traverse is reversed, the groove 51 leads back to the right and at the first crossover e 'rangement at the crossovers, as regards their depth, is more specifically explained in reference to their relationship at the crossing points. In accordance with the present invention the groove 50 extends in a normal helical course from the point m to the first crossover a where its course is staggered as shown in Figs. 4 and 6. At this point the portion of.

the groove 50 which intersects the groove 51 at one side thereof is not continued in its true course on the opposite side of groove 51, but, on the contrary, its continuing portion is staggered or offset to the right as illustrated at 52 in Fig; 4. As the groove50 continues in its portion beyond the crossover a it intersects the groove 51 again at the point I), see

Fig. 3, and at this point its course is also diverted-from normal. That is to say, as the groove 50 crosses the groove 51 at the point 6, instead of continuing in a straight course its portion beyond the groove 51 is again staggered with respect to its first portion or, in other words,'olfset to the right at 53.

Ithas been discovered that by thus ofisetting the two portions of the groove at the .point of their intersection with the reverse groove, the tendency of the strand to become diverted from its course in the groove of a given direction is overcome. This tendency is as next explained. The strand 3 represented by dotted lines in Figs.- 3 and 4, has a tendency to drag on the right-hand edge of the groove 51 or, in other words, to lag in its.

this action.

traverse to the left in this groove. This lagging tendency would normally cause the yarn.

to catch on the point 12 extending toward the crossover of the two grooves 50 and 51 and as over and thus its traverse to the left will be continued without interruption.

' At the next crossover 0, which occurs on the opposite side ofthe roll 15 at a point midway between its ends, the groove 50 is continued in its normal course without .a break or off-- set, see Fig. 4, while the opposite groove 51 has its course abruptly alteredas later more specifically described, the reason being that U at this point the groove 50 is of greater depth than groove 51 so that the strand 3 will not have a tendency to follow into the groove 51. Likewise, at the point d the groove 50 continues in a normal course without interruption and again at the crossover e the continuing portion of the groove is normal to its main Starting at the point z, where the direction this groove has its course diverted by ofl'setshown at 54 in-Fig. 4. Again, at the crossover at the continuing portion of the groove 51 beyond the groove 50 is ofl'set to the left at 55 and still again at the crossover a, as indicated at 56in Fig. 4. Beyond the crossover 0 the groove continues through the'cross--.

overs b and win an uninterrupted course to the point w. g

It is to be understood that at the central crossover 0 it is immaterial which one of the grooves is staggered, the arrangement being dependent upon which groove is given the greatest depth at this point. It has before I been explained in connection withFig. 5 that thegrooves 50 and 51 are'of the same depth throughout the greater portion of their extent, but at the points where one .groove crosses the other the profile of the bottom of I one ofthe grooves is raisedto. a higher level than'that of the other groove. a In the present form of construction the groove 50 starts at the maximum depth, indicated at 57 in Fig.

5, but where it crosses the groove 51 at the 'point'a its-bottom makes an abrupt rise near the periphery of the roll, as indicated at 58 in Fig. 5. The opposite or continuing portion of the groove 50 also has less depth at the point 59, but the profile immediately de- I scends to give the maximum depth to the groove 50 just beyond the crossover a. The

grooves 50 and 51 have a similar profiling. at .the crossover b, the groove 50 being of minimum depth and the groove 51 of maximum depth at this crossover; but at the central crossover c the groove 50 continues at maxi-.

of course, that the arrangement of the crossover a at the center of the roll could be reversed by having the groove 50 of minimum depth and ofiset and the groove 51 .of maximum depth without any ofiset. I

The method of operation of the complete machine for winding, a bobbin Bis-p aced on one of the spindles 42 of the'sup'ply holder and turned downintothe position shown in Fig. 2 with its deliveryiend pointing toward the tension-device 30. The yarn 'y is. drawn ofi from the nose of the'bobbin, led through the guide and" slub-catcher 34 and thence earned down between thetension-disks 32. From the tension-device 30 the yarn is drawn up across-the auxilia guide or roller 36, thence over the threadi145 and its end -at-' tached to the cop-tube or receiver T which The end of the yarn is usually attached to the cop-tube T b' winding. a few turns around the base end of the tube in the groove t rovided for that purpose.

' ith the machine threaded up in this manner the arm.16 is lowered to place the surface of the cop-tube T. in contact with the peri hery of the roll 15 which functions as the driving-means therefor.- As the cop-tube .isplaced against the roll 15 it will be rotated-v thereby and immediately the receiver starts towind on the yarn the strand will be entered into one or the other of the grooves 50 or 51in the surface of the roll; it being understood that the roll is continuously drivein in the direction indicated by thearrow in i 2. a

e yarn y is thus automatically entered into the groove in the traverse-roll to be traversed longitudinally of the cop-tube or receiver 'T in the manner as next explained.

It will be understood that the yarn 3 draws Jwross the thread-bail and through the groove inv the roll 15 at artang'ent to the bottonithereof, feeding to. the package at 'apoint of proximityto its .point of contact with the periphery of the roll, see Fig. 2.

Fig. 1 of the drawings illustrates the parts of thewinding mechanism in position after the roll 15 has traversed the yarn y from the .base end of the tube Tto its apex end inthree convolutions encompassing the periph- M cry of the tube, and back again in the oppomachine is as next explained. To pre are the site direction with two convolutions, the return traverse being thus incomplete.

The method by which the strand is traversed and caused to follow each groove or 51 from end to end thereof without being diverted into the reverse groove at the crossovers will now be explained in detail. For convenience of explanation let it be assumed that the strand 3 is feeding through the groove 50 at the right-hand end or starting point a: of this groove, indicated at a: in Fig. 3. As the roll 15 rotates inthe direction of feed of the strand, or in a clockwise direction as viewed from the right-hand end of the roll, the yarn will follow the groove 50 from the point a: to be traversed toward the left.

That portion of the groove 50 extending from the point 0: toward the first'crossover a is of groove directing its course.. As the roll 15 turns to a position as illustrated in Fig. 4

' maximum depth, as before indicated, and the yarn-feeds therethrough with the side of-the the yarn ,3 reaches .the crossovera and .at this point israised above the normal level ofthe groove by the abrupt rise of the bottom thereof indicated at,58 in Fig. 5. Afs theroll 15 continues'its rotation with the yarn passing throu h the crossover a' there will be a tendency or the strand to lag as it is acted. on laterallyby the right-hand side of the groove 50; Under such a tendency the yarn oove 5'0 and, unless provision is made for t at-this point and'the strand find its lace in between the walls 0 this portion 0 the groove 50 where. it leads out .from the side of the groove 51;' the action of the strand being indicated by the dotted line in Fig. .4. .The traverse of the strand is thus continued to the left without interruption at the crossover a and the same procedure takes. place .as the strand through the crossover b as indicated dottedline in Fig. 3 of the drawings.

The oove 50 next crosses the groove51 at a point e uidistant from the ends of the roll and at t crossover its course is normal without any staggering or ofisetting of has previously been placed on the spindle 5. will be bent around the end of the wall of the its branches. .The groove 50 is of maximum.

depth where it crosses the groove 51 at the point 0, whereas, the bottonf of the groove 51 is raised at this crossover as previousl explained. Since the yarn will ass throug the crossover c at the lower leve it will have no tendency to be diverted into the groove 51. Stated briefly, thestrand will be guided gards the crossover d, the groove 50 at this posite of t 5 the le pointbeing deeper-than :thegroove 51 and therefore acting positively on the yarn with .out chance of its being diverted into the groove 51. -The crossover ate is also of the same arrangement as at a and d, the groove 50 being deeper than the groove 51 at this point z the traverse of the yarn is reversed to cause itto feed back in the opposite direction, or to the right as viewed in the present' drawings, the yarn being now guided in the groove 51. At the first point elwhere the groove 51 crosses the groove 50 the con.- tinui portion of the groove 51 is ofi'setto as shown at 54 in Figs. fl; andi6. This arran ement of the grooves is the opiat at the crossover a, the continuing portion of the groove 51 being ofi-, set to the left of the opposite section thereof-because the tendency of the yarn y is to lag 01'- t6 be retarded with respect to the direction of its movement which is towards the right.

- The turning of the roll 15 causes the yarn 'to travel in the groove 51 from the crossover 0 to the crossover d where the formation of the grooves is similar to that at e.

- less depth than the groove 50 so that the action of the yarn in passing through this crossover is the same as previously described. Continuing from the crossover '0 the course of the groove 51 is normal at the crossovers b and a, see Fig. 6,-it having been previously explained that the other groove 50 is disc at these points and raised above the level of the groove'51 which is of maximum depth from just beyond the crossover Y c to the point z where its terminus joins 'observed that, the rotation of. the roll 15 thegroove 50.

From the above explanation it will be causes the yarn to be traversed back and forth on the yarn-receiver or other support coextensively with thelength of the package bein wound and without chance of the traverse eing. shortened by diversion of the strand from the groove extending in one div rection to that leading in the opposite direction. The operation of'the machine iscontinuous as long as there is a supply of. yarn feeding to the package. When an interruption in the supply'occurs, due to breakage or exhaustion 0 tion is automatically arrested'by raising the package off from the roll 15. After the supply'has been replenished and the end pieced up the, winding operation is started again by lowering the packageinto contact with the roll 15; Atthe completion of the package to the desired size the winding-operation is arrested by an automatic sizing device, not herein shown, and the package removed and a fresh yarn-receiver placed on the spindle 5.

It is to be particularly observed that the yarn, the winding operathrou h the use of my improved traverse- 7 roll t e winding mechanism is very materially simplified, the form of construction of the machine as herein shown requiring but one winding element, namely, the roll 15 which acts both to rotate the package and traverse the yarn thereon. No reciprocating or oscillating thread-guides or other moving parts requiring a reversal of motion are einployed in the machine and thus it may be operated at a much higher rate of speed to correspondingly increase its rate of production.

The present improved traverse-roll of;

' the utmost simplicity as regards the formation of its surface grooves. No cutting away or profiling of the walls of the grooves is necessary, the grooves. being of geometric arrangement as illustrated by the diagram showingthe development of the surface of the roll in Fig. '6. 1 This provides that the roll may be manufactured' by ordinary machining'operations withgreater speed and economy and without requiring profiling by vhand. It also provides for economical manufacture of the rolls if moldednor cast. It has been demonstrated that the present form of roll is of high efiiciency'and capable of guiding the yarn with greater precision and accuracy than the usu'alreciprocating threadguide; the yarn being deposited on the package at its point of contact with the roll to prevent the coils from sliding or slipping out of place. Furthermore, the knuckles or bends of the yarn where it is reversed at the ends of traverse are made sharper and more definite so'that there is less chance of the coils slipping over the edge of the package and becoming displaced to form what 'is I known as overruns or cobwebs.

While the present invention is herein shown in a preferred form of construction,

and as applied'to a certaintype of winding mechanism,'-it is to be understood that variations may be made in the form and structure of the rotating element or roll and its method of application to use without departing. from the spirit or scope of the invention. Therefore, without limiting myself in this respect,

Iclaamz- I .tion of the 1. A traversing-means for winding and like machines comprising a rotatable element having on its peripheral surface a yarn-receiving and iding groove of oppositely-extending an crossing helices, said groove having staggered portions at the cross-overs to insure the yarn being guided in a predetermined directlon.

2. A traversing-means for Winding and like machines comprising a rotatable element having a peripheral yarn-receiving and guiding groove extending helicallyin opposite directions with its convolutions crossing each other and with the portions of the groove which intersect a reversely-extending portion thereof disposed in oflset relationshlp on opposite sides of the crossover.

3. A traversing-means for winding and like machines comprising a rotatable element having its periphery provided with a yarnreceiving and guiding groove consisting of oppositely-extending crossing helices. forming a continuous path for the yarn, with a portion of the groove which intersects a reverse portion of. the groove at one side thereof offset from the continuing portion of the groove extending in the same direction on the other side of the crossing.

4. A traversing-means for winding and like machines comprising a rotatable element having a continuous helical yarn-receiving and guiding groove the oppositely extending convolutions of which cross each other, with portions of the groove extending in a given direction laterally offset ,one with respect to the other at their point of inter section with an oppositely-extending portion of the groove.

5 A traversing-meansfor winding and like machines comprising a rotatable element provided with a helical yarn-receiving and guiding groove having its convolutions crossing each other, with portions of the groove normal course at the point where it crosses another portion of the groove extending in a reverse direction.

8. A traversing-means for winding and like machines comprising a rotatable element having its periphery traversed by a continuous helical yarn-receiving and guiding groove extending in opposite directions with its convolutions crossing each other, a portion of the groove at a crossing being deeper than the reversely extending portion of the groove .which it crosses, and one portion of the groove having its entering section offset with respect to its continuing section at the point of intersection with a reversely-extending portion of the groove.

sisting of oppositely-extending crossing convolutions, certain of the convolutions leading I in a given direction being norgnal at the crossovers and those leading in the'opposite direction having portions oflset laterally one withrespect to the other where they intersect a crossing convolution.

In testimony whereof I hereunto afiix my signature.

. ANTON E. B'OOD.

extending in a given'direction oflset laterally one with respect to the other on opposite s ides of their intersection with another porgroove extending in the reverse direction.

6. A traversing-means like machines comprising a rotatable roll having its periphery provided with a helical yarn-receiving and guiding groove of oppositely-exten'ding crossing convolutions, a portion of the groove extending in a. given direction being disposed in a staggered course at its point-of intersection with the reversely I extending portion of the groove.

7. A traversing-means for winding and like machines comprising a rotatable element for winding and having on its periphery a helical yarn-receiving and guiding groove constituted by a plurality of crossing convolutions extending in opposite directions in a generally normal course, but with a portion of the groove extending in a. given direction ofiset from its 

